Have downloaded apple iPhone apps to my PC. Now I can’t transfer them to my Apple 4S iPhone.
It is a easy job with Syncios iPhone Transfer. It can backup & transfer Music, Video, Apps, Podcast, Photos, Contacts, Notes to your computer even the iTunes.
use USB cable or via Itunes
sync your phone and use the backup option in the sync
you should be able to via iTunes, just drag and drop the application from APP tab to your phone
You'll need to be a bit more specific. If you've BOUGHT apps through iTunes, the sync procedure is pretty self explantory and consists of.. plugging in the phone to the computer via the supplied USB cable.
If you downloaded pirate apps and games, then...
perhaps with CopyTrans Manager
Make use you are using the latest version of iTunes which is 10.6.3
Try authorized your computer in iTunes and sync again.
If not, delete the apps on your computer and iPhone.
Download the app on iTunes on your computer and sync to your phone.
sync via iTunes